org.apache.cassandra.db.compaction.SSTableSplitter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-all Show documentation
Show all versions of cassandra-all Show documentation
The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.db.compaction;
import java.util.*;
import java.util.function.Predicate;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.compaction.writers.CompactionAwareWriter;
import org.apache.cassandra.db.compaction.writers.MaxSSTableSizeWriter;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.apache.cassandra.db.lifecycle.LifecycleTransaction;
public class SSTableSplitter
{
private final SplittingCompactionTask task;
private CompactionInfo.Holder info;
public SSTableSplitter(ColumnFamilyStore cfs, LifecycleTransaction transaction, int sstableSizeInMB)
{
this.task = new SplittingCompactionTask(cfs, transaction, sstableSizeInMB);
}
public void split()
{
task.execute(new StatsCollector());
}
public class StatsCollector implements CompactionManager.CompactionExecutorStatsCollector
{
public void beginCompaction(CompactionInfo.Holder ci)
{
SSTableSplitter.this.info = ci;
}
public void finishCompaction(CompactionInfo.Holder ci)
{
// no-op
}
}
public static class SplittingCompactionTask extends CompactionTask
{
private final int sstableSizeInMB;
public SplittingCompactionTask(ColumnFamilyStore cfs, LifecycleTransaction transaction, int sstableSizeInMB)
{
super(cfs, transaction, CompactionManager.NO_GC, false);
this.sstableSizeInMB = sstableSizeInMB;
if (sstableSizeInMB <= 0)
throw new IllegalArgumentException("Invalid target size for SSTables, must be > 0 (got: " + sstableSizeInMB + ")");
}
@Override
protected CompactionController getCompactionController(Set toCompact)
{
return new SplitController(cfs);
}
@Override
public CompactionAwareWriter getCompactionAwareWriter(ColumnFamilyStore cfs,
Directories directories,
LifecycleTransaction txn,
Set nonExpiredSSTables)
{
return new MaxSSTableSizeWriter(cfs, directories, txn, nonExpiredSSTables, sstableSizeInMB * 1024L * 1024L, 0, false);
}
@Override
protected boolean partialCompactionsAcceptable()
{
return true;
}
}
public static class SplitController extends CompactionController
{
public SplitController(ColumnFamilyStore cfs)
{
super(cfs, CompactionManager.NO_GC);
}
@Override
public Predicate getPurgeEvaluator(DecoratedKey key)
{
return time -> false;
}
}
}